Java spring 框架 - 如何设置内容类型？
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Java spring framework - how to set content type?
提问by Ian morgan
I have a spring action that I am rendering some json from the controller, at the minute its returning the content type 'text/plain;charset=ISO-8859-1'.
我有一个弹簧动作，我正在从控制器渲染一些 json，在它返回内容类型“text/plain;charset=ISO-8859-1”的那一刻。
How can I change this to be 'application/json'?
如何将其更改为“应用程序/json”？
采纳答案by Bozho
Pass the HttpServletResponseto your action method and set the content type there:
将 传递HttpServletResponse给您的操作方法并在那里设置内容类型：
public String yourAction(HttpServletResponse response) {
response.setContentType("application/json");
}
回答by Ichiro Furusato
Yes, but this only works if one is grabbing the HttpServletResponse in the controller.
是的，但这只适用于在控制器中抓取 HttpServletResponse 的情况。
In Spring 3 we're being encouraged to avoid references to anything in the servlet domain, keeping things solely to our POJOs and annotations. Is there a way to do this without referencing the HttpServletResponse? I.e., keeping ourselves pure?
在 Spring 3 中，我们被鼓励避免引用 servlet 域中的任何内容，只保留我们的 POJO 和注释。有没有办法在不引用 HttpServletResponse 的情况下做到这一点？即，保持自己的纯洁？
回答by Thomas Vanstals
Did you try using the MappingHymansonJsonView?
您是否尝试使用MappingHymansonJsonView？
Spring-MVC View that renders JSON content by serializing the model for the current request using Hymanson's ObjectMapper.
Spring-MVC 视图，通过使用 Hymanson 的 ObjectMapper 序列化当前请求的模型来呈现 JSON 内容。
It sets the content-type to: application/json.
它将内容类型设置为：application/json。
回答by JOKe
@RequestMapping(value = "jsonDemoDude", method = RequestMethod.GET)
public void getCssForElasticSearchConfiguration(HttpServletResponse response) throws IOException {
String jsonContent= ...;
HttpServletResponseWrapper wrapper = new HttpServletResponseWrapper(response);
wrapper.setContentType("application/json;charset=UTF-8");
wrapper.setHeader("Content-length", "" + jsonContent.getBytes().length);
response.getWriter().print(jsonContent);
}
You can also add the aditional X bytes or whatever for "callback" part in case you want JSONP( cross site json request ) .
您还可以为“回调”部分添加额外的 X 字节或任何内容，以防您需要JSONP（跨站点 json 请求）。
